Hey there - try grabbing the latest version from the games website (http://zombiebarricades.com/download/zbportable.exe)
Sorry for your troubles!
Its a good game but its lagging really hard, keep up the work if its dont have the lags it will be a good game, oh and idk the delay on the move is bcs of lags or bcs of options
Hey, lag on movement will be fixed next update - thanks for the feedback! :)